As part of your industrial IoT solution, you have 10 wind turbines equipped with several sensors. All of these sensors send thousands of telemetry data to an IoT hub. You have built a solution which provides real-time visibility, on-the-fly analysis of key data for the operations staff. For troubleshooting and further analysis purposes, you decide to use the Connections and Device telemetry logs and send them to the Log Analytics via diagnostic settings in the IoT hub. 
Is that sufficient to achieve your goal?

Answer options:

A.Yes
B.No

Correct Answer: A
Option A is CORRECT because while resource logs are generated automatically, in order to make them available for later use, a diagnostic setting must be configured in the IoT Hub for redirecting data into one of the three destinations: Log Analytics, Event hubs, Storage account. No automatic log collection takes place.
Option B is incorrect because resource logs (like Connections and Device telemetry) are generated automatically by Azure resources, in order for them to be collected, you need to configure a diagnostic setting in the IoT Hub. So, the correct answer is: Yes.
Diagram: 

References: 

https://docs.microsoft.com/en-us/azure/azure-monitor/insights/monitor-azure-resource#configure-monitoring
https://docs.microsoft.com/en-us/azure/iot-hub/monitor-iot-hub